| Device Error Action | |
| CDR RN, RA invalid char set RDCHK; if IOSTOP set, stop simulator with INVCHR | |
| unattached stop simulator with UNATT (CHANGED - used to set RDCHK too) | |
| end of file stop simulator witn NOCD (CHANGED - used to set RDCHK too) | |
| file read error set RDCHK; stop simulator with IOERR | |
| input line too long set RDCHK; stop simulator with IOERR | |
| CDP WN,DN invalid digit set WRCHK; if IOSTOP set, stop simulator with INVCHR | |
| WA invalid char set WRCHK; if IOSTOP set, stop simulator with INVCHR | |
| unattached stop simulator with UNATT (CHANGED - used to set WRCHK too) | |
| file write error set WRCHK; stop simulator with IOERR | |
| LPT bad K control field set PRCHK; if IOSTOP set, stop simulator with INVFNC | |
| WN,DN invalid digit set PRCHK and WRCHK; if IOSTOP set, stop simulator with INVFNC | |
| WA invalid char set PRCHK and WRCHK; if IOSTOP set, stop simulator with INVFNC | |
| unattached stop simulator with UNATT (CHANGED - used to set WRCHK too) | |
| file write error set PRCHK and WRCHK; stop simulator with IOERR | |
| PTR RN, RA invalid char set RDCHK but complete operation; if IOSTOP set at end, stop simulator with INVCHR | |
| RN, RA parity error set RDCHK but complete operation; if IOSTOP set at end, stop simulator with INVCHR | |
| WN, DN invalid digit set WRCHK; if IOSTOP set, stop simulator with INVCHR | |
| WA invalid char set WRCHK; if IOSTOP set, stop simulator with INVCHR | |
| unattached stop simulator with UNATT (CHANGED - used to set WRCHK too) | |
| file write error set WRCHK; stop simulator with IOERR | |
| TTY RN, RA invalid char ignored, echoed as beep/bell | |
| WN, DN invalid digit ignored, printed as : | |
| WA invalid char set WRCHK; if IOSTOP set, stop simulator with INVCHR |